We use simulations to explore which of these equilibrium outcomes is eventually realized (if any), depending on which learning rules the players apply. When two selfish learners interact, most of the time they either end up in mutual cooperation or mutual defection (Fig. REF b). Although cooperation is socially optimal, an overwhelming majority of simulations give rise to an all-defection equilibrium with low payoffs. The observed learning dynamics change completely if one (or both) of the two learners switches to FMTL. In that case, most simulated pairs of learners end up cooperating (Fig. REF c). Remarkably, players yield almost full cooperation already for low benefit-to-cost ratios, where it is usually difficult to establish cooperation [1]} (Fig. REF d). The final strategies appearing in Fig. REF c are illustrated in Fig. REF .
